Method for sharing a random-access memory between two asynchrono

Details Method for sharing a random-access memory between two asynchrono Method for sharing a random-access memory between two asynchrono

1993-06-11

1999-07-27

Chan, Eddie P.

395474, 395559, G06F 1336

Patent

active

059305029

ABSTRACT:
A data processing system includes a shared random-access memory which is shared between a first and second asynchronous processor, wherein an access to the memory is clocked by a clock signal issuing from a first processor. A two-state selection signal is generated having a frequency equal to half the frequency of the clock signal. Access to the memory by the first processor to the memory is enabled when the selection signal is in a first state, and access to the memory by the second processor to the memory is enabled when the selection signal is in a second state. Thus, a memory is shared between two processors of different speeds, the clock signal therefore issuing from the faster processor.

REFERENCES:
patent: 4164787 (1979-08-01), Aranguren
patent: 4594657 (1986-06-01), Byrns
patent: 4616310 (1986-10-01), Dill et al.
patent: 4803618 (1989-02-01), Ita et al.
patent: 5179665 (1993-01-01), Roslund et al.
patent: 5263150 (1993-11-01), Chai-I Fan

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